Adjective: characterized by being subjected to a hellacious sequence of unexpected, stressful, unfortunate events leaving a person feeling as they were shitted on.

When she got home from work, Jane Doe went straight to the fridge and poured herself a glass of vino, sat down on her couch, and exhaled with exasperation after having such a shitacious day of dealing with incompetent, complaining coworkers and needy clients.